From patchwork Mon Dec 7 13:24:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Iwashima, Kuniyuki" X-Patchwork-Id: 11955861 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88AE3C4361B for ; Mon, 7 Dec 2020 13:29:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 55CBE233A0 for ; Mon, 7 Dec 2020 13:29:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726055AbgLGN2u (ORCPT ); Mon, 7 Dec 2020 08:28:50 -0500 Received: from smtp-fw-9102.amazon.com ([207.171.184.29]:5379 "EHLO smtp-fw-9102.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725917AbgLGN2u (ORCPT ); Mon, 7 Dec 2020 08:28:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.jp; i=@amazon.co.jp; q=dns/txt; s=amazon201209; t=1607347730; x=1638883730; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=rwwsd+4koA6t9hA5HF4gY60ckOiP8zAYsJKIAgHSb5c=; b=mUxqO/Z689jDpfZwwJjkumDZsIRhViJiM++1aueWuReI77rqGJaOT6f6 AI01b/z/LToI9mGyDM+GW0oPH1DQusji+QbgSmTA1QZkFsZYX+pOLpdk5 hiSq/Xsxvp/gcTUT/0kpVOe3fRR18NuhvY81FeVWkxi4w/RnykfZnrf2F c=; X-IronPort-AV: E=Sophos;i="5.78,399,1599523200"; d="scan'208";a="102282946" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-1d-16425a8d.us-east-1.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP; 07 Dec 2020 13:28:08 +0000 Received: from EX13MTAUWB001.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan3.iad.amazon.com [10.40.163.38]) by email-inbound-relay-1d-16425a8d.us-east-1.amazon.com (Postfix) with ESMTPS id A71E51010F1; Mon, 7 Dec 2020 13:28:05 +0000 (UTC) Received: from EX13D04ANC001.ant.amazon.com (10.43.157.89) by EX13MTAUWB001.ant.amazon.com (10.43.161.249) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 7 Dec 2020 13:28:04 +0000 Received: from 38f9d3582de7.ant.amazon.com (10.43.161.43) by EX13D04ANC001.ant.amazon.com (10.43.157.89) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 7 Dec 2020 13:28:00 +0000 From: Kuniyuki Iwashima To: "David S . Miller" , Jakub Kicinski , Eric Dumazet , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau CC: Benjamin Herrenschmidt , Kuniyuki Iwashima , Kuniyuki Iwashima , , , Subject: [PATCH v2 bpf-next 10/13] bpf: Add migration to sk_reuseport_(kern|md). Date: Mon, 7 Dec 2020 22:24:53 +0900 Message-ID: <20201207132456.65472-11-kuniyu@amazon.co.jp> X-Mailer: git-send-email 2.17.2 (Apple Git-113) In-Reply-To: <20201207132456.65472-1-kuniyu@amazon.co.jp> References: <20201207132456.65472-1-kuniyu@amazon.co.jp> MIME-Version: 1.0 X-Originating-IP: [10.43.161.43] X-ClientProxiedBy: EX13D37UWC002.ant.amazon.com (10.43.162.123) To EX13D04ANC001.ant.amazon.com (10.43.157.89) Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This patch adds u8 migration field to sk_reuseport_kern and sk_reuseport_md to signal the eBPF program if the kernel calls it for selecting a listener for SYN or migrating sockets in the accept queue or an immature socket during 3WHS. Note that this field is accessible only if the attached type is BPF_SK_REUSEPORT_SELECT_OR_MIGRATE. Link: https://lore.kernel.org/netdev/20201123003828.xjpjdtk4ygl6tg6h@kafai-mbp.dhcp.thefacebook.com/ Suggested-by: Martin KaFai Lau Signed-off-by: Kuniyuki Iwashima --- include/linux/bpf.h | 1 + include/linux/filter.h | 4 ++-- include/uapi/linux/bpf.h | 1 + net/core/filter.c | 15 ++++++++++++--- net/core/sock_reuseport.c | 2 +- tools/include/uapi/linux/bpf.h | 1 + 6 files changed, 18 insertions(+), 6 deletions(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index d05e75ed8c1b..cdeb27f4ad63 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1914,6 +1914,7 @@ struct sk_reuseport_kern { u32 hash; u32 reuseport_id; bool bind_inany; + u8 migration; }; bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info); diff --git a/include/linux/filter.h b/include/linux/filter.h index 1b62397bd124..15d5bf13a905 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -967,12 +967,12 @@ void bpf_warn_invalid_xdp_action(u32 act); #ifdef CONFIG_INET struct sock *bpf_run_sk_reuseport(struct sock_reuseport *reuse, struct sock *sk, struct bpf_prog *prog, struct sk_buff *skb, - u32 hash); + u32 hash, u8 migration); #else static inline struct sock * bpf_run_sk_reuseport(struct sock_reuseport *reuse, struct sock *sk, struct bpf_prog *prog, struct sk_buff *skb, - u32 hash) + u32 hash, u8 migration) { return NULL; } diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index c7f6848c0226..cf518e83df5c 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -4462,6 +4462,7 @@ struct sk_reuseport_md { __u32 ip_protocol; /* IP protocol. e.g. IPPROTO_TCP, IPPROTO_UDP */ __u32 bind_inany; /* Is sock bound to an INANY address? */ __u32 hash; /* A hash of the packet 4 tuples */ + __u8 migration; /* Migration type */ }; #define BPF_TAG_SIZE 8 diff --git a/net/core/filter.c b/net/core/filter.c index 77001a35768f..7bdf62f24044 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -9860,7 +9860,7 @@ int sk_get_filter(struct sock *sk, struct sock_filter __user *ubuf, static void bpf_init_reuseport_kern(struct sk_reuseport_kern *reuse_kern, struct sock_reuseport *reuse, struct sock *sk, struct sk_buff *skb, - u32 hash) + u32 hash, u8 migration) { reuse_kern->skb = skb; reuse_kern->sk = sk; @@ -9869,16 +9869,17 @@ static void bpf_init_reuseport_kern(struct sk_reuseport_kern *reuse_kern, reuse_kern->hash = hash; reuse_kern->reuseport_id = reuse->reuseport_id; reuse_kern->bind_inany = reuse->bind_inany; + reuse_kern->migration = migration; } struct sock *bpf_run_sk_reuseport(struct sock_reuseport *reuse, struct sock *sk, struct bpf_prog *prog, struct sk_buff *skb, - u32 hash) + u32 hash, u8 migration) { struct sk_reuseport_kern reuse_kern; enum sk_action action; - bpf_init_reuseport_kern(&reuse_kern, reuse, sk, skb, hash); + bpf_init_reuseport_kern(&reuse_kern, reuse, sk, skb, hash, migration); action = BPF_PROG_RUN(prog, &reuse_kern); if (action == SK_PASS) @@ -10017,6 +10018,10 @@ sk_reuseport_is_valid_access(int off, int size, case offsetof(struct sk_reuseport_md, hash): return size == size_default; + case bpf_ctx_range(struct sk_reuseport_md, migration): + return prog->expected_attach_type == BPF_SK_REUSEPORT_SELECT_OR_MIGRATE && + size == sizeof(__u8); + /* Fields that allow narrowing */ case bpf_ctx_range(struct sk_reuseport_md, eth_protocol): if (size < sizeof_field(struct sk_buff, protocol)) @@ -10089,6 +10094,10 @@ static u32 sk_reuseport_convert_ctx_access(enum bpf_access_type type, case offsetof(struct sk_reuseport_md, bind_inany): SK_REUSEPORT_LOAD_FIELD(bind_inany); break; + + case offsetof(struct sk_reuseport_md, migration): + SK_REUSEPORT_LOAD_FIELD(migration); + break; } return insn - insn_buf; diff --git a/net/core/sock_reuseport.c b/net/core/sock_reuseport.c index 1011c3756c92..b877c8e552d2 100644 --- a/net/core/sock_reuseport.c +++ b/net/core/sock_reuseport.c @@ -313,7 +313,7 @@ static struct sock *__reuseport_select_sock(struct sock *sk, u32 hash, goto select_by_hash; if (prog->type == BPF_PROG_TYPE_SK_REUSEPORT) - sk2 = bpf_run_sk_reuseport(reuse, sk, prog, skb, hash); + sk2 = bpf_run_sk_reuseport(reuse, sk, prog, skb, hash, migration); else sk2 = run_bpf_filter(reuse, socks, prog, skb, hdr_len); diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index c7f6848c0226..cf518e83df5c 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -4462,6 +4462,7 @@ struct sk_reuseport_md { __u32 ip_protocol; /* IP protocol. e.g. IPPROTO_TCP, IPPROTO_UDP */ __u32 bind_inany; /* Is sock bound to an INANY address? */ __u32 hash; /* A hash of the packet 4 tuples */ + __u8 migration; /* Migration type */ }; #define BPF_TAG_SIZE 8